JP4691902B2 - Display device - Google Patents

Description

  The present invention relates to a display device, and is particularly suitable for application to a large flat display panel.

In recent years, large-scale flat display panels have been actively developed. Typical examples are 1) plasma display panel (PDP), 2) field effect display panel (FEDP), 3) organic EL panel (OELP), and 4) liquid crystal display panel (LCDP). (For example, Non-Patent Document 1).
Nikkei Electronics, November 18, 2002, no. 835, pp. 106-126

However, the PDP not only has a complicated device structure, but also the production cost is high because it is important to control the atmosphere of the plasma generation site. In addition, since PDP has low light emission efficiency, it consumes a lot of energy and has a short panel life. FEDP uses field emission of electrons when a voltage is applied to a microneedle electrode (carbon nanotubes or the like are used). Like PDP, atmosphere control in the element is important and the element structure is complicated. Therefore, the production costs are high and the lifetime is short. OELP is a completely solid-state device, and unlike PDP and FEDP, a high vacuum portion is not required in the device, so the structure is simple compared to the former two, but the lifetime of the luminescent dye is short, and impurities Due to the great influence, it is necessary to refine the material and strictly seal the product, resulting in considerable difficulty in commercialization. LCDP has a relatively simple structure and consumes less energy and has a long life, but it cannot absorb a large amount of light because it is absorbed by a polarizing plate, a retardation plate, or a color filter. In addition, LCDP has a very large problem that it has a narrow viewing angle and is used as a display.
Therefore, the problem to be solved by the present invention is to provide a display device that has a long life, low energy consumption, low cost, high brightness, a wide viewing angle, and can be easily enlarged.

  As a result of intensive studies to solve the problems of the above-mentioned conventional flat display, the present inventors use an external light source and control the display mechanically to display these problems. In conclusion, the present invention has been devised. According to this, a problem with a self-luminous element such as PDP, FEDP, and OELP, that is, a considerable current flows through each element or a high heat is generated, which essentially shortens the lifetime of the element. The problem is solved, and the problem that the device structure becomes complicated and the production cost increases is also solved. Furthermore, the problem that the viewing angle is essentially limited in LCDP is solved. In this system in which an external light source is mechanically controlled, the response speed of the element becomes a problem because it involves physical motion, but it can be solved by miniaturizing the element.

That is, in order to solve the above problem, the first invention
Controlling the incidence of light from the light guide plate to the transparent rod by driving a transparent rod having a light incident portion and a light exit end face inside one or a plurality of holes provided in the light guide plate, It is a display device characterized by displaying.

The second invention is
One light guide plate having one or more holes;
One or a plurality of transparent rod-like bodies having a light incident part and a light emission end face provided so as to be linearly or rotationally movable inside the hole and selectively provided on the outer peripheral surface thereof,
An image is displayed by controlling the incidence of light from the light guide plate to the transparent rod through the light incident portion by linearly or rotationally moving the transparent rod within the hole. Display device.

  In the first and second inventions, typically, an external light source is used, and display light is incident on the light guide plate from the outside. Then, the light is incident on the transparent rod-shaped body through the light incident portion, and the light is emitted from the light emitting end surface of the transparent rod-shaped body, thereby displaying an image. The light guide plate desirably has a light diffusing function in order to allow light to spread throughout the light guide plate. Typically, the outer peripheral surface and the end surface of the transparent bar excluding the light incident portion and the light emitting end surface are covered with a light reflecting film. In this case, a portion of the outer peripheral surface of the transparent rod-shaped body that is not covered with the light reflecting film forms an opening, which becomes a light incident portion. The light reflecting film only needs to have a high light reflectivity and is not necessarily required to have conductivity. However, when an electrostatic force is used to drive the transparent rod-like body, the light reflecting film needs to have conductivity. In the case of performing color display, each of the transparent bar-like bodies of at least two or more transparent bar-like bodies, usually each of the three transparent bar-like bodies of three transparent bar-like bodies per pixel, To add substances (fluorescent dyes, pigments, etc.) that emit fluorescence (eg, RGB) having different wavelengths. Alternatively, at least two or more transparent rods, usually three transparent rods for each pixel are colored in different colors (RGB). For coloring, a colorant or pigment that serves as a color filter is added. In order to make the display screen easier to see, it is desirable to provide a light scatterer (such as a diffusion plate) on the light exit end face of the transparent rod-shaped body. For driving the transparent rod-shaped body, for example, an electrostatic force, a deformation force by a piezo element, a linear motor such as an electrostatic motor, or the like can be used.

The third invention is
A plurality of light guide plates having one or a plurality of holes and optically separated from each other;
A plurality of transparent rod-shaped bodies having a light incident portion and a light exit end surface provided so as to be linearly movable or rotationally movable inside the hole and selectively provided on the outer peripheral surface thereof;
For each transparent rod-shaped body of the plurality of transparent rod-shaped bodies, the transparent rod-shaped body is linearly moved or rotated within the hole to transmit light from the light guide plate to the transparent rod-shaped body via the light incident portion. A display device that displays an image by controlling incidence.

In the third aspect of the invention, typically, display lights (for example, RGB) having different wavelengths from each other are incident on a plurality of light guide plates from the outside to perform color display.
Regarding matters other than those described above, what has been described in relation to the first and second inventions is valid as long as it is not contrary to the nature thereof.

  In the present invention configured as described above, by driving the transparent rod inside the hole of the light guide plate, the light guide plate and the light incident portion of the transparent rod are aligned and shifted from each other. By changing the above, on / off switching of the incidence of light from the light guide plate to the transparent rod-shaped body can be performed.

  According to the present invention, since a large current does not flow or high heat is not generated unlike a self-luminous element, it has a long life and low energy consumption. In addition, since the structure is simple, the productivity is high and it can be manufactured at low cost. Further, light absorption by the component parts can be suppressed to a minimum, so that high luminance can be achieved. In principle, the viewing angle can be increased. Further, it is easy to increase the size by arranging a desired number of two-dimensional basic structures in which transparent rods are combined in the holes of the light guide plate. That is, it is possible to obtain a display device that has a long life, low energy consumption, low cost, high luminance, a wide viewing angle, and can be easily enlarged.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings of the embodiments, the same or corresponding parts are denoted by the same reference numerals.
1A and 1B show a basic structure corresponding to a pixel of a display device according to an embodiment of the present invention, FIG. 1A is a front view (viewed from the display side), and FIG. 1B is a cross-sectional view of FIG. 1A. The display device is configured by two-dimensionally arranging this basic structure in the required number and the required arrangement.

  As shown in FIGS. 1A and 1B, in the basic structure of this display device, light reflecting films 12 and 13 are coated on both surfaces of a flat light guide plate 11, and a light shielding plate 14 is provided on the light reflecting film 13 side. It is pasted together. The light reflecting films 12 and 13 are for suppressing light leakage from the light guide plate 11 to the outside and improving the light use efficiency. A black coating 15 is applied to the light reflection film 12 side of the light guide plate 11, that is, the screen side, so that black is conspicuous and reflection on the screen can be prevented so that good display characteristics can be obtained. It has become. The laminated structure composed of the light guide plate 11, the light reflection films 12, 13, the light shielding plate 14, and the black coating 15 is provided with a minute cylindrical hole 16 corresponding to one pixel. A cylindrical shuttle 17 made of a transparent material is incorporated in the hole 16 so as to be slidable (slidable) in the longitudinal direction. The outer peripheral surface of the shuttle 17 and the end surface (bottom surface) opposite to the display side are covered with a light reflecting film 18 except for the outer peripheral surface portion at the center in the longitudinal direction of the shuttle 17. A portion of the outer peripheral surface of the shuttle 17 where the light reflecting film 18 is not provided is referred to as an opening 19. The width of the opening 19 is selected to be approximately the same as the thickness of the light guide plate 11, but may be slightly smaller or larger than this as long as there is no hindrance to the display. In the state shown in FIG. 1B, the opening 19 is located in the light shielding plate 14, and at this time, the light reflection film 18 faces the light guide plate 11, which is in the off state. In this OFF state, the end surface on the display side of the shuttle 17 is flush with the surface of the black coating 15, but it is not always necessary to do so, and even if it is shifted from the surface of the black coating 15. Good. In order to form the light reflecting film 18 having the opening 19, for example, a metal reflecting film is coated by vacuum deposition or the like in a state where the portion corresponding to the opening 19 on the outer peripheral surface of the shuttle 17 is masked in advance. That's fine.

For example, the diameter of the hole 16 is about 50 to 400 μm, the width of the opening 19 is about 50 to 400 μm, the light guide plate 11, the light reflecting films 12 and 13, the light shielding plate 14, and the black coating 15. The thickness of the laminated structure made of is, for example, about 100 to 1000 μm.
The thinner the light guide plate 11 is, the shorter the shuttle 17 can be shortened, and accordingly the display response speed becomes faster. However, the distance required for switching is determined by the width of the opening 19 of the shuttle 17. Can be chosen sufficiently small as described above, so it is not an essential problem.

  As a material of the light guide plate 11, basically any material may be used as long as it shows transparency according to the wavelength region of incident light, but a material having a high refractive index is desirable. Specifically, in the visible light region, for example, acrylic, carbonate, cellulose, vinyl alcohol, amide, imide, styrene, arylate, ester, sulfone, ethersulfone, epoxy, etc. Inorganic materials such as transparent resin, quartz and glass are used. As the transparent resin, for example, engineering plastics such as polymethyl methacrylate (PMMA) and polycarbonate (PC) can be used.

Moreover, as the light reflection films 12, 13, and 18, for example, those having a metal surface containing at least one kind of metal having high light reflectivity such as aluminum, silver, gold, copper, and chromium are used.
As a material of the light shielding plate 14, any material that does not transmit incident light can be used without any particular problem. Specifically, black materials typified by carbon black or the like are mixed into the materials mentioned as the material of the light guide plate 11, or black pigments dispersed in non-transparent plastics other than the above are used. Can be used.

  As materials for the shuttle 17, those listed as materials for the light guide plate 11 can be used. However, in order to suppress reflection / scattering of light at the interface between the shuttle 17 and the light guide plate 11, it is desirable to use the same material as that of the light guide plate 11 as the material of the shuttle 17. In addition, the shuttle 17 is preferably structured so that scattering occurs by dispersing components having different refractive indexes in order to effectively extract incident light to the screen side.

  In order to make the movement of the shuttle 17 smooth, a lubricant (not shown) can be used between the shuttle 17 and the hole 16 as necessary. As the lubricant, basically any lubricant may be used as long as it is transparent in the use wavelength region. Preferably, the refractive index is the refractive index of the material of the light guide plate 11 or the shuttle 17. The one that is as close as possible to the rate is used.

Next, an operation method of this display device will be described.
First, as shown in FIG. 1B, in the off state, the opening 19 on the outer peripheral surface of the shuttle 17 is located in the light shielding plate 14, and the light guide plate 11 faces the light reflecting film 18. Incident light traveling through the light plate 11 is reflected by the light reflecting film 18 and does not enter the shuttle 17. In this state, no light is emitted from the display-side end face of the shuttle 17 and no display is performed. As a light source for incident light, laser light can be used in addition to fluorescent lamps and LEDs used in LCDs.

Next, as shown in FIG. 2, in the ON state, the shuttle 17 is slid to the display side in the hole 16 so that the opening 19 of the shuttle 17 is positioned in the light guide plate 11. In this state, the incident light traveling in the light guide plate 11 enters the interior of the shuttle 17 through the opening 19, and is scattered and reflected repeatedly and radiated to the display side screen. Is displayed.
The light is turned on / off by the linear movement of the shuttle 17, that is, switching is performed according to an image signal.

  3A and 3B show an example of a display device in which a large number of the above basic structures are arranged in a two-dimensional array (only a part of which is shown in the figure). Here, FIG. 3A is a front view, and FIG. 3B is a cross-sectional view.

In order to colorize the display device, a dye (pigment) that emits fluorescence corresponding to RGB may be added to the shuttle 17, or a dye (pigment) that functions as a color filter may be added.
As a method for colorizing the display device, there is the following method in addition to the method for providing the shuttle 17 with the function as described above. 4A and 4B show a display device using this method. However, FIG. 4A shows an off state, and FIG. 4B shows an on state. As shown in FIGS. 4A and 4B, in this display device, the laminated structure shown in FIGS. 2A and 2B is laminated in three stages corresponding to RGB. The light guide plates 11 are optically separated from each other. Corresponding to this three-stage stacking, the R shuttle 17 is provided with an opening 19 in a portion located in the R light guide plate 11 in the on state, and the G shuttle 17 is in the G state in the on state. An opening 19 is provided at a portion located in the light guide plate 11, and the B shuttle 17 is provided with an opening 19 at a portion located in the B light guide plate 11 in the ON state. Then, as shown in FIG. 4B, in the on state, the R incident light 1, the G incident light 2 and the B incident light 3 incident on the R, G, and B light guide plates 11 respectively. Remove from the display side end face of the R, G and B shuttles 17. The advantage of this method is that the color (wavelength) of light for each light guide plate 11 is determined, so that the colors are not mixed by reflection from the shuttle 17.

  In contrast, in the above-described method of adding color to the shuttle 17 by adding a fluorescent dye, a pigment, a color filter, or the like, light scattered from the shuttle 17 leaks into the light guide plate 11 and light having different wavelengths enters the light guide plate 11. There is a possibility of mixing. In order to prevent this mixing of light, as shown in FIG. 5, it is necessary to position the color developing portion 20 such as a fluorescent dye, a pigment, or a color filter at the display side end of the shuttle 17 as much as possible. In this case, the amount of light can be controlled by how much the sliding opening 19 overlaps the light guide plate 11.

  As shown in FIG. 6, in order to scatter the light emitted from the display side end face of the shuttle 17 to weaken the directivity, a light scatterer 21 having irregularities on the surface is provided on the end face on the screen side. desirable. By doing so, the display screen is easy to see.

  As a driving method of the shuttle 17, basically any method may be used as long as an electrical signal can be converted into a linear motion of the shuttle 17. Specifically, for example, there are a method using an electrostatic force, that is, an electric repulsion / attraction force, and a method using a deformation force generated by a piezo element that causes a volume change due to a voltage.

  7A and 7B show a method of driving the shuttle 17 using electrostatic force. However, FIG. 7A is an off state, and FIG. 7B is an on state. As shown in FIG. 7A, at least the rear surface side of the light shielding plate 14 is made of a conductive material, and the shuttle 17 is charged via the light shielding plate 14 and parallel to the light shielding plate 14 so as not to contact the shuttle 17. The electrode 22 is arranged on the placed substrate (not shown) so as to face the bottom surface of the shuttle 17. Then, as shown in FIG. 7B, the electrode 22 is charged to generate an attractive force / repulsive force with the shuttle 17, and the shuttle 17 is slid to connect the opening 19 of the shuttle 17 and the light guide plate 11. Control light on / off by matching or shifting.

  As shown in FIG. 8, when the piezo element is used, the shuttle 17 is directly joined to the piezo element 23, and when the piezo element is used, an oil or the like is interposed between the piezo element 23 and the shuttle 17 as shown in FIG. A case where the shuttle 17 is moved by injecting the non-volatile and low-viscosity liquid 24 and completely sealing it with the sealing wall 25 and pushing or sucking the liquid 24 by the volume change of the piezo element 23 can be considered. 8 and 9, reference numerals 26 and 27 denote driving electrodes for the piezo element 23, and 28 denotes a driving power source. The former has a high response speed, but the latter has excellent productivity because it only needs to be positioned and laminated properly. In addition, the shuttle 17 can be driven with low energy consumption by attaching a mechanism for collecting the charged electric charge to the piezo element 23. As the piezo element 23, it is necessary to select a piezo element according to the amount of movement of the shuttle 17 necessary for turning on and off the light. Since the piezo element 23 alone cannot be expected to have such a large amount of change, it is desirable to reduce the thickness of the light guide plate 11 to reduce the amount of movement of the shuttle 17.

The shuttle 17 may be driven using a pulse drive induction charge motor (electrostatic motor). In this method, the dielectric 17 attached to the shuttle 17 or the shuttle 17 made of the dielectric itself is driven by using attractive and repulsive forces between charges induced by a plurality of electrodes.
A first example of this method is shown in FIGS. 10A and 10B. Here, FIG. 10A shows an off state, and FIG. 10B shows an on state. As shown in FIG. 10A, in this example, a rod-shaped dielectric 29 is attached to the bottom surface side of the shuttle 17. Then, for example, disk-shaped electrodes 30 and insulating films 31 are alternately stacked, and a hole 32 having a size capable of accommodating the rod-shaped dielectric 29 is provided through the stacked structure. A rod-shaped dielectric material 29 is accommodated in 32. Such a laminated structure can be easily formed by, for example, laminating a copper polyimide film, which is a flexible substrate, and making holes 32 in the laminated structure so as to match the size of the rod-shaped dielectric 29. . In this case, the driving force increases as the number of layers of the electrode 30 of the stacked structure increases. A known dielectric can be used as the rod-shaped dielectric 29.

The electrode 30 is connected to the same external electrode (not shown) every three layers, and voltages V1, V2, and V3 are applied to the respective electrodes 30 in order. Then, as shown in FIG. 10B, the rod-shaped dielectric 29 is driven by attractive force / repulsive force with the electric charge generated on the rod-shaped dielectric 29 by applying this voltage, and the shuttle 17 is driven thereby.
This driving method will be described in more detail with reference to FIGS. 11A, 11B and 11C. First, as shown in FIG. 11A, when V1 = + V, V2 = −V, and V3 = 0 are applied to the electrode 30, charges (+, −) are induced on the rod-shaped dielectric 29. Next, as shown in FIG. 11B, when V1 = −V, V2 = + V, and V3 = −V are applied by switching the voltage applied to the electrode 30, a driving force as indicated by an arrow is generated. Further, as shown in FIG. 11C, when V1 = 0, V2 = + V, and V3 = −V are applied by switching the voltage applied to the electrode 30, the initial state is restored.

The shuttle 17 can also be driven as follows using an electrostatic motor. That is, as shown in FIG. 12, the opening 19 of the shuttle 17 is formed to be shifted toward the display side end face. The opening angle of the opening 19, that is, the angle at which the opening 19 is viewed from the central axis of the shuttle 17 is defined as θ ₁ . For example, θ ₁ is 180 degrees (corresponding to the case where the opening 19 is formed in the upper half of the shuttle 17 in FIG. 12). On the other hand, as shown in FIG. 13, a light shielding film 33 is formed in a region including the portion where the opening 19 is located when the inner wall of the hole 16 is off. An opening angle of the light shielding film 33, that is, an angle at which the light shielding film 33 is viewed from the central axis of the hole 16 is defined as θ ₂ . In this case, θ ₂ ≧ θ ₁ is set so that light does not enter the shuttle 17 from the light guide plate 11 in the off state. For example, when θ ₁ = 180 degrees, θ ₂ is set to 190 to 220 degrees, for example. FIG. 13 shows a case where a light shielding film 33 is formed in substantially the lower half of the hole 16. Then, as shown in FIG. 14, the shuttle 17 is inserted into the hole 16. A rod-shaped dielectric 29 is attached to the bottom surface side of the shuttle 17. As shown in FIG. 15, electrodes 34 are arranged in a cylindrical shape around the rod-shaped dielectric 29 in a strip shape. As shown in FIGS. 10A and 10B, every three electrodes 34 are connected to the same external electrode, and voltages V1, V2, and V3 are applied to the respective electrodes 34 in order. According to this method, the shuttle 17 can be rotated around its central axis. As a result of this rotation, when the opening 19 coincides with the portion of the light guide plate 11 where the light shielding film 33 is not formed, light enters the shuttle 17 from the light guide plate 11 and is turned on. When it coincides with the light shielding film 33 of the light plate 11, the light is not incident on the shuttle 17 from the light guide plate 11 and is turned off. That is, light can be switched on and off by the rotational movement of the shuttle 17.

As described above, according to the display device according to the embodiment, the shuttle 17 having the opening 19 and the light emitting end face is incorporated in the hole 16 of the light guide plate 11 and the shuttle 17 is driven according to the image signal. Since the incidence of light from the light guide plate 11 to the shuttle 17 and hence the emission of light from the light exit end face of the shuttle 17 are turned on / off, the following many advantages can be obtained. That is, in this display device, unlike self-luminous elements such as PDP, FEDP, OELDP and the like, a large amount of current does not flow and high heat is not generated, so that a long life and low power consumption can be achieved. . Moreover, this display device has a wider viewing angle and higher luminance than LCDP due to its device structure. Furthermore, this display device is easier to adjust the hue than PDP, FEDP, OELDP and the like. Further, when dot dropping (damage in units of pixels) or the like occurs in the manufacturing process of the display device, basically, the shuttle 17 at that portion can be replaced, so that the productivity is high and the atmosphere such as a high vacuum portion is high. Since there is no part that needs to be controlled and process management is easy, the display device can be manufactured at low cost. Furthermore, since the display device can be configured only by two-dimensionally arranging the basic structure including the holes 16 and the shuttle 17 of the light guide plate 11, the size can be easily increased.
As described above, a large flat display panel having a long life, low power consumption, high luminance, wide viewing angle, and low cost can be realized.

The embodiment of the present invention has been specifically described above, but the present invention is not limited to the above-described embodiment, and various modifications based on the technical idea of the present invention are possible.
For example, the numerical values, structures, shapes, materials, processes, and the like given in the above-described embodiments are merely examples, and different numerical values, structures, shapes, materials, processes, and the like may be used as necessary.
Specifically, for example, the shuttle 17 may be fixed on an electrode that bends by an electric field, and the shuttle 17 may be driven by deflecting the electrode by an electric field.

It is the front view and sectional drawing which show the basic structure of the display apparatus by one Embodiment of this invention. It is sectional drawing which shows the basic structure of the display apparatus by one Embodiment of this invention. It is a front view which shows the display apparatus by one Embodiment of this invention. It is sectional drawing which shows the display apparatus by one Embodiment of this invention. It is sectional drawing which shows the display apparatus by one Embodiment of this invention. It is sectional drawing which shows the display apparatus by one Embodiment of this invention. It is sectional drawing which shows the display apparatus by one Embodiment of this invention. It is a basic diagram for demonstrating the drive method of the shuttle in the display apparatus by one Embodiment of this invention. It is a basic diagram for demonstrating the drive method of the shuttle in the display apparatus by one Embodiment of this invention. It is a basic diagram for demonstrating the drive method of the shuttle in the display apparatus by one Embodiment of this invention. It is a basic diagram for demonstrating the drive method of the shuttle in the display apparatus by one Embodiment of this invention. It is a basic diagram for demonstrating the drive method of the shuttle in the display apparatus by one Embodiment of this invention. It is a basic diagram for demonstrating the drive method of the shuttle in the display apparatus by one Embodiment of this invention. It is a basic diagram for demonstrating the drive method of the shuttle in the display apparatus by one Embodiment of this invention. It is a basic diagram for demonstrating the drive method of the shuttle in the display apparatus by one Embodiment of this invention. It is a basic diagram for demonstrating the drive method of the shuttle in the display apparatus by one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Light guide plate, 12, 13, 18 ... Light reflection film, 14 ... Light-shielding plate, 16 ... Hole, 17 ... Shuttle, 19 ... Opening part, 20 ... Color development part, 21 ... Light-scattering body, 23 ... Piezoelectric body, 30 34 ... Electrode, 29 ... Rod-shaped dielectric

Claims (15)

By driving a transparent rod-shaped body having a light incident portion and a light emitting end surface selectively provided on the outer peripheral surface inside one or a plurality of holes provided in the light guide plate, the transparent rod shape is driven from the light guide plate. It controls light incident on the body, the display device that displays an image. Display device 請 Motomeko 1, wherein Ru is incident light for display from the outside to the light guide plate. One light guide plate having one or more holes;
One or a plurality of transparent rod-like bodies having a light incident part and a light emission end face provided so as to be linearly or rotationally movable inside the hole and selectively provided on the outer peripheral surface thereof,
Inside the bore by linear or rotational movement of the transparent rod-like body Viewing device that displays an image by controlling the incidence of light into the transparent rod-like body from the light guide plate through the light entrance portion . The outer peripheral surface and end surface display device 請 Motomeko 3 described that covered by the light reflective film of the transparent rod-like body except for the light incident portion and the light-emitting end face. Display device 請 Motomeko 4, wherein the light-reflecting film is that having a conductivity. Display device 請 Motomeko 3 wherein Ru is incident light for display from the outside to the light guide plate. At least two for each transparent rod-like body of the transparent rod-like body, adding a substance that emits fluorescence of different wavelengths by the light for the display, the display device of the row cormorants請 Motomeko 6, wherein the color display. At least two of the transparent rod-like body colored in different colors, the display device of the row cormorants請 Motomeko 6, wherein the color display. The transparent rod-like body of the display device 請 Motomeko 3 wherein the light-scattering body that provided in the light-emitting end face. The transparent rod member electrostatic force display device 請 Motomeko 3 wherein you drive the deformation force or the linear motor by the piezoelectric element. A plurality of light guide plates having one or a plurality of holes and optically separated from each other;
A plurality of transparent rod-shaped bodies having a light incident portion and a light exit end surface provided so as to be linearly movable or rotationally movable inside the hole and selectively provided on the outer peripheral surface thereof;
For each transparent rod-shaped body of the plurality of transparent rod-shaped bodies, the transparent rod-shaped body is linearly moved or rotated within the hole to transmit light from the light guide plate to the transparent rod-shaped body via the light incident portion. Viewing device that displays an image by controlling the incident. Display device 請 Motomeko 11, wherein the outer peripheral surface and the end face of the transparent rod-like body except for the light incident portion and the light-emitting end face that is covered by the light reflective film. Display device 請 Motomeko 12, wherein the light reflective film that have a conductivity. The plurality of wavelengths with each other from the outside to the light guide plate is made incident respectively light for different display, the display device of the row cormorants請 Motomeko 11, wherein the color display. The transparent rod member electrostatic force display device 請 Motomeko 11 wherein you drive the deformation force or the linear motor by the piezoelectric element.

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